Chemical elements (and water) are stored in different forms across the biosphere 
–>
Matter is conserved
Energy flows, but matter is recycled
Each cycle includes aspects of Biology + Chemistry + Geology as elements move or are stored in the componenets of the biosphere
Importance of biogeochemical cycling: Nutrient limitation
Cycling = Transfer, transformation and storage
Biogeochemical cycles: Global
Nutrient cycles: Ecosystem
- Entry of nutrients into system
(IN)
- fixation (bacteria)
- weathering (rocks)
- deposition (acid rain)
- Internal transfer
(recycling)
- food webs
- decomposition
- inorganic - organic
- Loss of nutrients from system
(OUT)
- gas loss, leaching, disturbance
- Steady State and Succession….
Carbon cycle: Ecosystems
Carbon cycle: Global “sinks” and “sources” of carbon
Humans vs carbon sinks and storage…
Nitrogen cycle: Ecosystems
Nitrogen cycle: Ecosystems
Decomposition - Ecosystem internal recycling
Decomposition rate: Biomes (climate+microbes+material)
Nutrient transfer: Soil commmunity
Nitrogen cycle: Global
